blanshan



' model.) I J. BLANSHAN.

CLOCK ESGAPEMBNI. No.- 283,957. Patented Aug. 28, 1883.

' WITNESSES 1 INYENTOB JMWW B I ommrs.

UNITED STATES PATENT OFFICE.

JOI-IN BLANSHAN, OF LE FEVER FALLS, NEW YORK.

CLOCK-ESCAPEMENT.

SPECIFICATION- forming part of Letters Patent No. 283,957, dated August 28, 1883.

Application filed January 10, 1883. (Model) The invention also consists in suspending the pendulum upon a knife-edge.

Reference is to be had to the accompanying drawings, forming part of this specification,

in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a front elevation of my new and improved escapement and pendulum; and Fig. 2 is a side view of the pendulum and its knifeedge.

a represents the escapement-wheel; b, the verge; 0, the verge rod or wire, which is connected by the rod f to the lower end of the pivoted notched lever g.

h represents the pendulum-rod, and Z represents the knife-edge by which it is suspended from the bars j j. The pendulum-rod is provided with the pin or stud k, and this pin and the notched lever g are so arranged with ref erence to each other and the plane of vibration of the pendulum that the notch e of the lever will stand exactly in the path of the pin, so that the pin will strike in the notch as the pendulum passes the lever in both directions, and thus operate the verge and at the same time receive from the escapement wheel, through the verge-rod f and lever g, its modicum of maintaining-force.

i Z are stop-pins, which limit in both directions the movement of the verge rod or wire 0.

Constructed in this manner it will be seen that the pendulum swings almost entirely free of all pressure or friction (except the friction of the knife-edge Z, which is the minimum) through the greater part of its vibration, that it remains in contact with the lever 9 only an instant, and is then immediately detached entirely from the escapement, and that the action is positiye, rendering the movement perfectly uniform, accurate, and reliable.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent-- 1. In a clock, the combination, with the end the verge is caused to operate the escape ment-wheel, substantially as and for the purpose set forth.

2. The pendulum-rod h, provided with. the pin 70 and suspended by the knife-edge Z, in combination with the lever g, having the notch c, connecting-rod f, verge-rod c, verge b, and escapement-wheel a, substantially as and for the purposes set forth.

3. The combination, with the escapementwheel a, verge b, and verge-rod c, of the pendulum-rod I1,'lever g, and rod f, the pendulumrod being provided with the pin is, as and for the purposes set forth.

4. The pendulum-rod h, provided with the pink, and suspended by the knife-edge Z, in combination with the lever g, connecting-rod f, verge-rod c, verge I), and escapement-wheel a, as and for the purposes set forth.

JOHN BLANSHAN.

\Vitnesses:

OoRNELIUs I. LEFEVER, WALTER BoDLnY. 

